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TDA9829T Scheda tecnica(PDF) 8 Page - NXP Semiconductors |
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TDA9829T Scheda tecnica(HTML) 8 Page - NXP Semiconductors |
8 / 20 page 1998 Nov 09 8 Philips Semiconductors Product specification Downconverter for DVB TDA9829T Notes 1. Performance may be decreased at VP = 4.5 V. 2. This parameter is not tested during production and is only given as application information for designing the television receiver. 3. Mute state also can be achieved by leaving pin 20 open-circuit. 4. Resonance circuit of VCO: Q0 > 50; Cext, Cint and L see Table 2. 5. Temperature coefficient of external LC-circuit is equal to zero. 6. Response speed valid for an IF input level range of 200 µVupto70mV. 7. To match the AFC output signal to different tuning systems a current source output is provided. The test circuit is given in Fig.4. The AFC steepness can be changed by the resistors at pin 14. 8. Depending on the ratio ∆C/C0 of the LC resonant circuit of VCO (Q0 > 50; C0 =Cint +Cext; see Table 2). Table 1 Input frequencies, symbol frequencies and VCO frequencies ∆G IF IF slip by automatic gain control tuner gain current from 20 to 80% − 68dB AFC circuit (pin 14); see notes 7 and 8 and Fig.4 CRstps(US) control steepness ∆I14/∆fIF for USA fIF = 43.75 MHz 0.7 0.98 1.3 µA/kHz CRstps(EU) control steepness ∆I14/∆fIF for Europe fIF = 36.15 MHz 0.45 0.70 0.95 µA/kHz DVB output signal (IF input to DVB output) Vo(p-p) output voltage (pin 11) (peak-to-peak value) CL < 15 pF; RL >5kΩ; with internal AGC 1.8 2.1 2.4 V VO(DC) DC output voltage − 2.5 − V B−1dB −1 dB bandwidth CL < 15 pF; RL >5kΩ 11 12 − MHz B−3dB −3 dB bandwidth − 17 − MHz αC(DVB) fundamental input signal and IF harmonics 35 40 − dB α H suppression of in-band harmonics Vo = 2.0 V (p-p) 30 35 − dB PSRR power supply ripple rejection at pin 11 see Fig.5 26 36 − dB SYMBOL DESCRIPTION DVB (Europe) DVB (USA) UNIT fs Symbol frequency 6.9 5.0 MHz fIF IF frequency 36.15 43.75 MHz fVCO VCO frequency 86.0 97.5 MHz SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT |
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